Helically wound brush and holder therefor



y 22, 1952 E. LOSIEWICZ ET AL 2,603,807

HELICALLY WOUND BRUSH AND HOLDER THEREFOR File d Jan. 50, 1948 INVENTORS EDWARD. LOSIEWICZ GE ORGE BROCKLEHURST .BY A

TTORNEY Patented July 22, 1952 HELICALLY WOUND BRUSH AND HOLDER THEREFOR Edward Losiewicz and" George Brocklehurst,

' Detroit, Mich.

Application January 30, 1948,Serlal No. 5,396

The invention relates generally'to a brush comprising a helically wound longitudinal brush ele-, ment. The brush element preferably consists of.

a longitudinal metallic channel strip having bristles extending transversely therefrom andiheld in place bya longitudinal core member-within the channel'of the strip. The brush element, as described, -is' helically wound to form a brush with the bristles extending generally "radial direc.

tions." The inventio'n'relates-mor'e specifically to:

a rotatable holder "for "suclr a helicall wound Claims;

brush and to the combination of the: brush" with the-holder. x I *One 'object of the inventi n is to" provide 'aholder for a" helically wound brushsuch as described, which holder comprises a rotatable arbor and a member movable relatively to the arbor to forcibly engage the interior of the brush so as to tendto expand it'and thus-firmly hold itinplace. 7 I

Another object of the invention is to provide a rotatable holder such as last above set forth; wherein the relatively movable member is providedwith grooves for'receiving' some of the convolutions of the helically wound channel strip of a the brush, so as to prevehtendwise movementiof the brush with respect to the arbor. I

Another object of the invention is toprovide a combination of a helically-woundbrush andia holder having the above described characteristics.

Other objects of the invention. will beapparent from the drawing and from the following specification and claims.' l I 3 In the drawing we have shown indetail a preferred embodiment of theinvention, but it will be'understoodtthat various changes may be made from the construction shown and that the drawing'is not to be construed as defining or limiting the scopeof the invention, the claims forming a part of this specification being relied upon for that purpose: 1

ofthedrawingy Figjl is'a side view of a-brush and holder embodying the invention. y

Fig. 2 is a vertical sectional view. "Fig.3'isaleft'endview.i Fig. 4' is a vertical sectional view similar to Fig. 2, but omitting the "brush and showing the relatively movable member of the'holder in-a diiferent position. Fig; 5 is a plan view of the holder.

Referring to the drawing, lfl'represents the brush' in its entirety. 1 Thebrushl0 comprisesa helically wound longitudinal brush element-:which preferably 7 includes 'a longitudinal: .channela i2 rolled from a longitudinal metallic strip.-- A longitudinal core member 14 such as a wire is positioned within the channel of the channel strip and bristles I6 constituting a longitudinallayer are folded around-the coremember within-the channel, the end portions of thebristles projecting transversely from" the channel throughthe I neck between :the front portions of thejsidewalls thereof; During" manufacture the bristles: [5, while straight, are deposited with the core member [4 on the channel strip before the sides thereof areclosed to their finalposi-tions. The core member is guidediinto' theichannel; thus folding-the bristlesaround it. The sides of the channel strip are then-rolled or pressed against the bristlesto bind theseveralstrips together by pressure. p

The brush element as described is ordinarily initially straight, and it is then V helicallywound on a suitable mandreL-into the form shown in the drawing to provide longitudinally spaced con-1 volutions. While the invention is not necessarily so limited, the "brush is preferably so wound that the convolutions near one end are of successively smaller diameters to-provide a taper, At one end of the bIllShyWhiCh will be referred to as thefree end and which is ordinarily the smaller end, the brush elementis extended and bent for engagement with a driving lug on the arbor with which the brush is to be used. As-shown, the extension comprises a loop having two opposite parallel portions l8 and 20 which are equally spaced from the brush axis. If desired, the extreme end-portionof thebrush element .at the opposite,..end of the brush-maybe connected. with the. next adjacent convolution .by spot welding. or otherwise. -'I'hisyend portion of the brush .elementis indicated at 22 in Fig; l-.- After thebrush-"has been formedas described,-the-ends of the'bristles maybe trimmed to provide any: desired contour. The holder for use with a brush suchwas lll comprises an arbor 24 which is adapted to be supported at least atone end, and it is shown in'the drawing as adapted; to be supportedat one end only, that is, at the right end..-0rdinarily the arbor 24 isrotatable, but theinvention is not necessarily so limited. As shown, the arbor has a central hole 26 for-receiving the end portion of arotatable spindle 28, the arbor-being connected with the spindle by-any suitable-means such as a socketed set screvv iill. The a1 bq ;.z4 has a circumferentially extending exterior area adapted for engagement with the interior-of the brush. When thewbrush is tapered asshown- =-the arbor is similarly tapered;- When thebrush is providediiwithi an:clitens a t e outer-face-of"the harj-in moving ou'twar'd 3 s by which it may be driven, the arbor is provided at its free end with a lug adapted for engaging the extension. As shown, the extension on the brush comprises two parallel portions I8 and 20 at one end of the brush element, and the arbor 24 has an integral lug 32'with flat sides which are adapted tofit between the said portions I B and 2i]. The arbor 24 is provided with a 'lateralopen ing in the brush"'engaging area thereof and a movable brush tightening member is located 1Q chiefly within the said lateral opening. Means is provided for moving thetightening-member within the opening so as to force the outer'faice jthereof against the inner portions of some of the h convolutions of the channel stripof thebrus'hf; The shape of the lateral opening in the arborand the shape of the relatively mqvable brush 5:1

tightening member may be widely varied, but v preferably the said opening in the arber isa longitudinal slot 34. When the said opening is aislot suchas 34, the movable brush tightening. member is a longitudinal bar 36 fitting; the slot and-i extending lengthwise thereof. With: a tapered arbor the bar is correspondingly tapered. barn is movable outward relatively to the arbor andpreferablydt' is so movablelabou't a;trarisverse axis'adjacent the freeaend'of the arbor. -As shown; a transverse pivot pin 38? fextends through thej bar 36 and through the :adjacentporticn' of the arbor Means is'provided' for moving the bar pivotal 'outward andthis means pre'frablylcomprises ocketed' screw tlll textendihg radially through a threadedradial hole in the bar The; inner endof the screw '40 engages with the arbor." In" order that the screw f may be aecess ible with" the brush inplace onlthe holder, the bar l3li 'extends beyond the brush and the-screw E0 is located in the "extending "portion or the bar; erder; that the screw Mi -may be c offsuitable size, the bar is preferably enlarged to provide a" boss 52 and'the arbor is provided with g Ji l communicating with the slot 34 e table -size-td receive the boss '42;- i ably: a portionof the outer face-of -the pari provijded with transverse grooves which are s'h'a -1': ed and longitudinally spaced to receive of the convolutions of the channel strip of F rush It). The grooves 56 are preferably formedohly in that portion of the-outer face of bar which is'spaced from the pivot and which thereforeha's a substantial amount of movement; Theportion of the outer face-of the bar which is adjacent the pivot-is preferably smooth; "When the brushfffl is to be n'i'ounted on the holder, the-screw 'is 'partly withdrawn so to permit the bar=36 to oc cupy the relative position she ;-in F-' ig. 4." Then the brush H] is pushed into place with thelu'g}? on the arbor entered between the portions 1'8 and 29 on'the brush extension. 'Then the screw M is turned to force '6' pivotal-1y outward from the 'po'sition A FigI- tothe position shown in 2'. The ro'o'ves 4fi recei veandfit'some of the conions: et the hannel strip of the brush, and

l tends se expand; the brush so as "to firms-Irma at flhfpla'ceL j-The engagement of the inner porti'ons ofthe rush-convolutipns with the grooves 46 prevents any endwise' mov ment ofth bru'sh withrs'pct tothehblderl i P j?l(hen -;the brushfi'sfto' .be removed; the screw dais-partl withdrawn so as' to permit the bar QBto fii'dve' f'rom the position-shown in Fig. -2 'to the position shown in -Figs' liff'l h'enthe brush can ne readily 'withdrawn'from the homer.

What we claim is:

1. A holder for use with a brush comprising a metallic channel strip with bristles extendin therefrom which strip is helically wound with the bristles extending outward and has longitudinally spaced convolutions, the said holder comprising in combination, a longitudinal arbor hav= ing" a circumferentially" extending 'rex'terior area adaptedforengagementwith theinterior of the brush, the said arbor being provided with a lat- -eral opening in' the said brush engaging area thereof, a movable brush tightening member located chiefly within the said lateral opening and held to prevent relative longitudinal movement,

the said member having transverse grooves in its outer face which grooves are shaped and longitudinally-spaced for receiving and fitting the inner portions of some of the convolutions of the" channel strip of the brush, and means for moving the tightening member in the outward direction in the said opening: to force the grooved outer face thereof'againstithe said inner portions of the last said convolutions: v

2. A holder'for use with ,a brush comprising; a metallic channel strip with bristles extending therefrom which strip isihelically wound; with the 'bristlesextending outward and which brush is tapered and has longitudinally spaced; convolutions," the said holder comprising in combina'.- tion alongitudinal arbor adapted to: be. rotatably. supportedi atione :end and having a circumferentially extending exterior area adjacent its free end adapted for engagement with the interior of the brush, the, said arbor being tapered;-=in

slot and tapered in conformity with the taper of the arbor which bar is held to prevent relative longitudinal movement and has transverse grooves in its outer face; theisaid grooveshein shapedand longitudinally spaced for receivin and fittingthe'inner portions of some of the convolutions of the channel strip of the brush, and means for moving the bar in the outward direc tion in the said slot to force the outer face thereof against the inner portions of some of thezlast said convolutions. V

3. A holder for use with a brush comprising a metallic channel strip with :bristlesextending therefrom which strip is helically'wound-with the bristles extending'outward and haslongitudinally spaced convolutions, the-said holder comprising in combination, a longitudinal arbor adapted to be rotatably' supported and "havin a circumferentially extending exterior area adapted for engagement withthe interior-pf the brush, the said :arbor being provided with alongi; tudinal slot in the said brush engaging area thereof, a longitudinal bar located chiefly within the said slot and Ypivotally movable about a transverse axis near the free end of'ithe arbor and in fixed relation thereto which bar :has transverse grooves in its outer face athe said grooves being shaped and longitudinally spaced for receiving and fittingthe {inner portions of some of the convolutions of. the channel -strip*;of'the brush, and means adjacent the end :of-fthe-rhar opposite the pivotal sax isiand beyondlthejstrid transverse grooves for moving the bar :pivotally last-said convolutions. 1:

adapted to be rotatably supported and pavin a" 'circumferentially extending exterior area adapted for engagement with the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof, a longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor and in fixed relation thereto, the portion of the outer face of the bar adjacent the said transverse pivotal axis being smooth and the portion of the outer face of the bar spaced from the said axis having transverse grooves therein which grooves are shaped and longitudinally spaced for receiving and fitting some of the convolutions of the channel strip of the brush, and means for moving the bar pivotally outward in the said slot to force the said smooth and outer portions of the face thereof against the inner portions of the last convolution of the channel strip of the brush.

A holder for use with a brush comprising a metallic channel strip with bristles extending therefrom which strip is helically wound with the bristles extending outward and has longitudinally spaced convolutions, the said holder comprising in combination, a longitudinal arbor adapted to be rotatably supported and having a circumferentially extending exterior area adapted for engagement with the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof, a longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor, and a radial screw engaging the bar and the arbor at a position remote from the said transverse axis for moving the former pivotally outward in the said slot to force the outer face thereof against the inner portions of some of the convolutions of the channel strip of the brush.

6. A holder for use with a brush comprising a metallic channel strip with bristles extending therefrom which strip is helically wound with the bristles extending outward and has longitudinally spaced convolutions, the said holder comprising in combination, a longitudinal arbor adapted to be rotatably supported and having a circumferentially extending exterior area adapted for engagement with the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof and being provided with an opening communicating with the slot at the end thereof opposite the free end of the arbor, a longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor, the said bar having a boss at the end thereof opposite the pivot which boss is within the said opening in the arbor and has a threaded radial hole, and a radial vscrew in the threaded hole in the boss engageable at its inner end with the arbor for moving the bar pivotally outward in the said slot to force the outer face thereof against the inner portions of some of the convolutions of the channel strip of the brush.

'7. The combination of a brush comprising a metallic channel strip with bristles extending therefrom which strip is helically wound with the bristles extending outward and has longitu v this haying" (a c'ircumfefrefntially" exten ing fexterior area engaging the interior ofth rush, the, said arbor being provided jw Lla teral opening in the saidbrusli engagingf area 'thereof, a movable brush tightening" memberlo'cated chiefly within the said lateral opening and having transverse grooves in its outer face which grooves v are shaped and" longitudinally spaced ifor receiving and fitting the inner portions 'of some of theconvolutions of the channel strip of the brush, and means accessible beyond one end of the brush for moving the tightening member in the outward direction in the said opening so that the grooved outer face thereof is in forced engagement with the inner portions of the last said convolutions.

8. The combination of a helically wound brush comprising a metallic channel strip with bristles extending outward therefrom, an arbor adapted to be rotatably supported and having a circumferentially extending exterior area engaging the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof, a movable longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor, the said bar having transverse grooves in its outer face to receive some of the convolutions of the channel strip of the brush, and means accessible beyond the end of the brush opposite the said pivotal axis for moving the bar pivotally outward in the said slot so that the outer face thereof is in forced engagement with the inner portions of some of the convolutions of the channel strip of the brush.

9. The combination of a helically wound brush comprising a metallic channel strip with bristles extending outward therefrom, an arbor adapted to be rotatably supported and having a circumferentially extending exterior area engaging the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof, a movable longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor, the said bar extending beyondthe brush at the end opposite the said pivotal axis and provided adjacent the last said end with a radial threaded hole, and a radial screw in the said threaded hole engageable at its inner end with the arbor for moving the bar pivotally outward in the said slot'so that the outer face thereof is in forced engagement with the inner portions of some of the convolutions of the channel strip of the brush. 7

10. The combination of a helically wound brush comprising a metallic channel strip with bristles extending outward therefrom, an arbor adapted to be rotatably supported and having a circumferentially extending exterior area engaging the interior of the brush, the said arbor being provided with a longitudinal slot in the said brush engaging area thereof, a movable longitudinal bar located chiefly within the said slot and pivotally movable about a transverse axis near the free end of the arbor, the portion of the outer face of the bar adjacent the said transverse pivotal axis being smooth and the portion of the outer face of the bar spaced from the said axis having transverse grooves therein longitudinallyspaced to receive some of the convolutions of the channel strip of the brush, and means accessible beyond the end of the brush opposite the said pivotal axis for moving the bar 

